document.cpp

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    pIDataObject=TransferObjectCreate(fCut);

    if (NULL==pIDataObject)
        return FALSE;
    //End CHAPTER13MOD

    fRet=SUCCEEDED(OleSetClipboard(pIDataObject));
    pIDataObject->Release();

    //Delete our current data if "cut" succeeded.
    if (fRet && fCut)
        {
        m_pPL->New();
        FDirtySet(TRUE);
        }

    return fRet;
    }





/*
 * CCosmoDoc::RenderFormat
 *
 * Purpose:
 *  Renders a specific clipboard format into global memory.
 *
 * Parameters:
 *  cf              UINT format to render.
 *
 * Return Value:
 *  HGLOBAL         Global memory handle containing the data.
 */

HGLOBAL CCosmoDoc::RenderFormat(UINT cf)
    {
    HGLOBAL     hMem;

    if (cf==m_cf)
        {
        m_pPL->DataGetMem(VERSIONCURRENT, &hMem);
        return hMem;
        }

    switch (cf)
        {
        case CF_METAFILEPICT:
            return m_pPL->RenderMetafilePict();

        case CF_BITMAP:
            return (HGLOBAL)m_pPL->RenderBitmap();
        }

    return NULL;
    }







/*
 * CCosmoDoc::FQueryPaste
 *
 * Purpose:
 *  Determines if we can paste data from the clipboard.
 *
 * Parameters:
 *  None
 *
 * Return Value:
 *  BOOL            TRUE if data is available, FALSE otherwise.
 */

BOOL CCosmoDoc::FQueryPaste(void)
    {
    LPDATAOBJECT    pIDataObject;
    BOOL            fRet;

    if (FAILED(OleGetClipboard(&pIDataObject)))
        return FALSE;

    fRet=FQueryPasteFromData(pIDataObject);
    pIDataObject->Release();
    return fRet;
    }



/*
 * CCosmoDoc::FQueryPasteFromData
 * (Protected)
 *
 * Purpose:
 *  Determines if we can paste data from a data object.
 *
 * Parameters:
 *  pIDataObject    LPDATAOBJECT from which we might want to paste.
 *
 * Return Value:
 *  BOOL            TRUE if data is available, FALSE otherwise.
 */

BOOL CCosmoDoc::FQueryPasteFromData(LPDATAOBJECT pIDataObject)
    {
    FORMATETC       fe;

    SETDefFormatEtc(fe, m_cf, TYMED_HGLOBAL);
    return (NOERROR==pIDataObject->QueryGetData(&fe));
    }




/*
 * CCosmoDoc::Paste
 *
 * Purpose:
 *  Retrieves the private data format from the clipboard and sets it
 *  to the current figure in the editor window.
 *
 *  Note that if this function is called, then the clipboard format
 *  is available because the Paste menu item is only enabled if the
 *  format is present.
 *
 * Parameters:
 *  hWndFrame       HWND of the main window.
 *
 * Return Value:
 *  BOOL            TRUE if successful, FALSE otherwise.
 */

BOOL CCosmoDoc::Paste(HWND hWndFrame)
    {
    LPDATAOBJECT    pIDataObject;
    BOOL            fRet;

    if (FAILED(OleGetClipboard(&pIDataObject)))
        return FALSE;

    fRet=PasteFromData(pIDataObject);
    pIDataObject->Release();

    return fRet;
    }




/*
 * CCosmoDoc::PasteFromData
 * (Protected)
 *
 * Purpose:
 *  Retrieves the private data format from a data object and sets
 *  it to the current figure in the editor window.
 *
 * Parameters:
 *  pIDataObject    LPDATAOBJECT from which to paste.
 *
 * Return Value:
 *  BOOL            TRUE if successful, FALSE otherwise.
 */

BOOL CCosmoDoc::PasteFromData(LPDATAOBJECT pIDataObject)
    {
    FORMATETC       fe;
    STGMEDIUM       stm;
    BOOL            fRet;

    SETDefFormatEtc(fe, m_cf, TYMED_HGLOBAL);
    fRet=SUCCEEDED(pIDataObject->GetData(&fe, &stm));

    if (fRet && NULL!=stm.hGlobal)
        {
        m_pPL->DataSetMem(stm.hGlobal, FALSE, FALSE, TRUE);
        ReleaseStgMedium(&stm);
        FDirtySet(TRUE);
        }

    return fRet;
    }




//CHAPTER13MOD
/*
 * CCosmoDoc::TransferObjectCreate
 * (Protected)
 *
 * Purpose:
 *  Creates a DataTransferObject and stuffs the current Polyline
 *  data into it, used for both clipboard and drag-drop operations.
 *
 * Parameters:
 *  fCut            BOOL TRUE if we're cutting, FALSE if we're
 *                  copying.
 *
 * Return Value:
 *  LPDATAOBJECT    Pointer to the object created, NULL on failure
 */

LPDATAOBJECT CCosmoDoc::TransferObjectCreate(BOOL fCut)
    {
    HGLOBAL         hMem;
    UINT            i;
    HRESULT         hr;
    STGMEDIUM       stm;
    FORMATETC       fe;
    LPDATAOBJECT    pIDataObject=NULL;
    const UINT      cFormats=3;
    static UINT     rgcf[3]={0, CF_METAFILEPICT, CF_BITMAP};
    static DWORD    rgtm[3]={TYMED_HGLOBAL, TYMED_MFPICT
                        , TYMED_GDI};

    hr=CoCreateInstance(CLSID_DataTransferObject, NULL
        , CLSCTX_INPROC_SERVER, IID_IDataObject
        , (PPVOID)&pIDataObject);

    if (FAILED(hr))
        return NULL;

    rgcf[0]=m_cf;

    for (i=0; i < cFormats; i++)
        {
        //Copy private data first.
        hMem=RenderFormat(rgcf[i]);

        if (NULL!=hMem)
            {
            stm.hGlobal=hMem;
            stm.tymed=rgtm[i];
            stm.pUnkForRelease=NULL;

            SETDefFormatEtc(fe, rgcf[i], rgtm[i]);

            pIDataObject->SetData(&fe, &stm, TRUE);
            }
        }

    return pIDataObject;    //Caller now responsible
    }



/*
 * CCosmoDoc::DropSelectTargetWindow
 * (Protected)
 *
 * Purpose:
 *  Creates a thin inverted frame around a window that we use to
 *  show the window as a drop target.  This is a toggle function:
 *  It uses XOR to create the effect so it must be called twice to
 *  leave the window as it was.
 *
 * Parameters:
 *  None
 *
 * Return Value:
 *  None
 */

void CCosmoDoc::DropSelectTargetWindow(void)
    {
    HDC         hDC;
    RECT        rc;
    UINT        dd=3;
    HWND        hWnd;

    hWnd=m_pPL->Window();
    hDC=GetWindowDC(hWnd);
    GetClientRect(hWnd, &rc);

    //Frame this window with inverted pixels

    //Top
    PatBlt(hDC, rc.left, rc.top, rc.right-rc.left, dd, DSTINVERT);

    //Bottom
    PatBlt(hDC, rc.left, rc.bottom-dd, rc.right-rc.left, dd
        , DSTINVERT);

    //Left excluding regions already affected by top and bottom
    PatBlt(hDC, rc.left, rc.top+dd, dd, rc.bottom-rc.top-(2*dd)
        , DSTINVERT);

    //Right excluding regions already affected by top and bottom
    PatBlt(hDC, rc.right-dd, rc.top+dd, dd, rc.bottom-rc.top-(2*dd)
        , DSTINVERT);

    ReleaseDC(hWnd, hDC);
    return;
    }

//End CHAPTER13MOD




/*
 * CCosmoDoc::ColorSet
 *
 * Purpose:
 *  Changes a color used in our contained Polyline.
 *
 * Parameters:
 *  iColor          UINT index of the color to change.
 *  cr              COLORREF new color.
 *
 * Return Value:
 *  COLORREF        Previous color for the given index.
 */

COLORREF CCosmoDoc::ColorSet(UINT iColor, COLORREF cr)
    {
    return m_pPL->ColorSet(iColor, cr);
    }





/*
 * CCosmoDoc::ColorGet
 *
 * Purpose:
 *  Retrieves a color currently in use in the Polyline.
 *
 * Parameters:
 *  iColor          UINT index of the color to retrieve.
 *
 * Return Value:
 *  COLORREF        Current color for the given index.
 */

COLORREF CCosmoDoc::ColorGet(UINT iColor)
    {
    return m_pPL->ColorGet(iColor);
    }






/*
 * CCosmoDoc::LineStyleSet
 *
 * Purpose:
 *  Changes the line style currently used in the Polyline
 *
 * Parameters:
 *  iStyle          UINT index of the new line style to use.
 *
 * Return Value:
 *  UINT            Previous line style.
 */


UINT CCosmoDoc::LineStyleSet(UINT iStyle)
    {
    return m_pPL->LineStyleSet(iStyle);
    }







/*
 * CCosmoDoc::LineStyleGet
 *
 * Purpose:
 *  Retrieves the line style currently used in the Polyline
 *
 * Parameters:
 *  None
 *
 * Return Value:
 *  UINT            Current line style.
 */


UINT CCosmoDoc::LineStyleGet(void)
    {
    if (NULL==m_pPL)    //m_pPL might not be valid yet
        return 0L;

    return m_pPL->LineStyleGet();
    }








/*
 * CPolylineAdviseSink::CPolylineAdviseSink
 * CPolylineAdviseSink::~CPolylineAdviseSink
 *
 * Constructor Parameters:
 *  pv              LPVOID to store in this object
 */

CPolylineAdviseSink::CPolylineAdviseSink(LPVOID pv)
    {
    m_pv=pv;
    return;
    }


CPolylineAdviseSink::~CPolylineAdviseSink(void)
    {
    return;
    }





/*
 * CPolylineAdviseSink::OnPointChange
 *
 * Purpose:
 *  Informs the document that the polyline added or removed a point.
 *
 * Parameters:
 *  None
 *
 * Return Value:
 *  None
 */

void CPolylineAdviseSink::OnPointChange(void)
    {
    PCDocument      pDoc=(PCDocument)m_pv;

    pDoc->FDirtySet(TRUE);
    return;
    }






/*
 * CPolylineAdviseSink::OnSizeChange
 *
 * Purpose:
 *  Informs the document that the polyline changed size.
 *
 * Parameters:
 *  None
 *
 * Return Value:
 *  None
 */

void CPolylineAdviseSink::OnSizeChange(void)
    {
    PCCosmoDoc      pDoc=(PCCosmoDoc)m_pv;
    RECT            rc;
    DWORD           dwStyle;

    /*
     * Polyline window is informing us that it changed size in
     * response to setting it's data.  Therefore we have to
     * size ourselves accordingly but without moving the screen
     * position of the polyline window.
     */

    pDoc->m_fNoSize=TRUE;

    //Set the document window size.
    GetWindowRect(pDoc->m_pPL->Window(), &rc);
    InflateRect(&rc, 8, 8);

    //Adjust for a window sans menu
    dwStyle=GetWindowLong(pDoc->m_hWnd, GWL_STYLE);
    AdjustWindowRect(&rc, dwStyle, FALSE);

    SetWindowPos(pDoc->m_hWnd, NULL, 0, 0, rc.right-rc.left
        , rc.bottom-rc.top, SWP_NOMOVE | SWP_NOZORDER);

    if (NULL!=pDoc->m_pAdv)
        pDoc->m_pAdv->OnSizeChange(pDoc, &rc);

    pDoc->m_fNoSize=FALSE;
    pDoc->FDirtySet(TRUE);

    return;
    }





/*
 * CPolylineAdviseSink::OnDataChange
 *
 * Purpose:
 *  Informs the document that the polyline data changed.
 *
 * Parameters:
 *  None
 *
 * Return Value:
 *  None
 */

void CPolylineAdviseSink::OnDataChange(void)
    {
    PCCosmoDoc      pDoc=(PCCosmoDoc)m_pv;

    if (NULL!=pDoc->m_pAdv)
        pDoc->m_pAdv->OnDataChange(pDoc);

    pDoc->FDirtySet(TRUE);
    return;
    }





/*
 * CPolylineAdviseSink::OnColorChange
 *
 * Purpose:
 *  Informs the document that the polyline data changed a color.
 *
 * Parameters:
 *  None
 *
 * Return Value:
 *  None
 */

void CPolylineAdviseSink::OnColorChange(void)
    {
    PCCosmoDoc      pDoc=(PCCosmoDoc)m_pv;

    pDoc->FDirtySet(TRUE);
    return;
    }





/*
 * CPolylineAdviseSink::OnLineStyleChange
 *
 * Purpose:
 *  Informs the document that the polyline changed its line style.
 *
 * Parameters:
 *  None
 *
 * Return Value:
 *  None
 */

void CPolylineAdviseSink::OnLineStyleChange(void)
    {
    PCCosmoDoc      pDoc=(PCCosmoDoc)m_pv;

    pDoc->FDirtySet(TRUE);
    return;
    }